55555511011 has 24 divisors (see below), whose sum is σ = 75924024624. Its totient is φ = 39960002880.

The previous prime is 55555510949. The next prime is 55555511059. The reversal of 55555511011 is 11011555555.

It is not a de Polignac number, because 55555511011 - 2¹¹ = 55555508963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55555511611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3957280 + ... + 3971293.

It is an arithmetic number, because the mean of its divisors is an integer number (3163501026).

Almost surely, 2^55555511011 is an apocalyptic number.

55555511011 is a deficient number, since it is larger than the sum of its proper divisors (20368513613).

55555511011 is a wasteful number, since it uses less digits than its factorization.

55555511011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928611 (or 7928604 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 34.

The spelling of 55555511011 in words is "fifty-five billion, five hundred fifty-five million, five hundred eleven thousand, eleven".